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Physics Class 11 - Chapter 4
Work And EnergyTest - 4
1.
The dimensions of power are?
a) ML
2
T
-3
b) ML
2
T
2
c) ML
2
T
-2
d) ML
2
T
3
2.
Propulsion force of rocket is?
a) Conservative force
b) Non conservative force
c) Both
d) None of these
3.
The dot product of force and velocity is?
a) Work
b) Torque
c) Impulse
d) Power
4.
The work done by friction is?
a) Negative
b) Parallel
c) Positive
d) Anti-parallel
5.
The source of tide energy is?
a) Earth
b) All of these
c) Moon
d) Sun
6.
The area under the force displacement graph is?
a) None of these
b) Area
c) Work done
d) Power
7.
Which type of source is geothermic?
a) All of these
b) Stable
c) Non-renewable
d) Renewable
8.
Cells which convert solar energy into electrical energy are?
a) Galcanic
b) Photovoltic
c) Rotary
d) None of these
9.
On a clear day at noon the solar energy reaching the earth is?
a) 1.55kw/m
2
b) None of these
c) 1kw/m
2
d) 1.44kw/m
2
10.
When arrow is released from its bow, its energy is transformed from?
a) Elastic P.E to K.E
b) Heat energy to K.E
c) K.E to elastic P.E
d) Chemical energy to P.E
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